We have a story around user info now

Co-authored-by: Yuxing Li <360983+jackielii@users.noreply.github.com>
Co-authored-by: Francisco Santiago <1737357+fjbsantiago@users.noreply.github.com>

oidc: Make userID configurable

Add option in oidc to hit the optional userinfo endpoint

Some oauth providers return "thin tokens" which won't include all of the
claims requested. This simply adds an option which will make the oidc
connector use the userinfo endpoint to fetch all the claims.

server: add metrics for CORS handlers.

fix typo

Round out logging interface with functions for all levels

docs: update bitbucket permission requirements

Print appropriate error

gitlab: support for group whitelist, add tests

cmd/dex/serve.go: log static client name instead of ID

Signed-off-by: Yann Soubeyrand <yann.soubeyrand@gmx.fr>

Update Docker build/image

- Update build container to golang:1.12.4-alpine
- Update dex image to alpine:3.9
- Run dex as non-root user
Signed-off-by: Stephen Augustus <saugustus@vmware.com>

Add option to OIDC connecter to override email_verified to true

Fix typo.

Add logger interface and stop relying on Logrus directly